Apparatus for loosening adhering particles from hot tubes, &amp;c.



PATENTED OCT. 18, 1904.

. F. HOSENPELDT. APPARATUS POR LOOSBNI-NG ADHERINGJPARTICLBS FROM HOT TUBES, 6m.

APPLIGATIoH FILED MAY z, 1903.

` 2 SHEETS-SHEET 1.

No MODEL.

No. 772,357. PATBNTED 00T. 18, 1904.

T. HosBNTBLDT. i A APPARATUS TOR LoosENING ADHERING PARTIcLBs PROM HOT TUBES, Aw.

APPLICATION FILED MAY 2, 1903.

N0 MODEL. 1 'Z SHEETS-SHEET 2- )frm/Veys UNTTED STATES Patented October 18, 1904.

PATENT OEETCE.

APPARATUS FOR LOOSEN'ING ADHERING PARTICLES FROM HOT TUBES, &c.

LPECIFIGATON forming part of Letters Patent No. 772,357, dated October 18, 1904.

Application filed May 2, 1903. Serial No. 155,360. (No model.)

T0 all whom. it 717,041/ crm/cern:

Be it known that I, FRANZ HosENFELD'r, engineer, a subject of the German Emperor, residing at Holthausenerstrasse, Dsseldorf- Reisholz, Germany.l have invented certain new and useful Improvements in Apparatus for Loosening Adhering Particles from Y Hot Tubes or Cylinders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In rolling or drawing tubes or the like of iron or steel from hot metal the scale and adhering furnace slag or cinders acquired during the preheating operation have a very unfavorable e'fect on the inished article, since these adherent matters are apt to be pressed or rolled into the blank and thus produce defects.

The present invention has for its object the loosening and separation of the strongly-adhering scale, slag, and cinders from the blank before it is further operated upon. For this purpose means are provided for working an expanding-block through the tube or the like, whereby the superficial area of the tube is increased and all adhering cinder and slag particles are loosened. The particles which fall away on the inside are pushed out by the block, while those which are loosened on the outside may be swept or blown away by a stream of water or jet of steam.

When rolling hollow cylinders of large diameter, the preheated blank should be cleaned without loss of time, and for this purpose the roller which is to operate upon the interior of the blank is provided at the end which first enters the blank with an expanding-head, so

that'by introducing the roller the 'blank is simultaneously expanded and cleaned.

In the accompanying drawings, Figure l is a longitudinal vertical section, and Fig. 2 a plan, of an apparatus'constructed according to this invention. Fig. 3 is a longitudinal section through a cylinder undergoing the operation of expansion. Fig. A is a sectional detailed view, of which Fig. 5 is an end elevation. Figs. 3 to 5 are drawn to an enlarged scale. Fig. 6 is a view similar to Fig. 1 of a portion of the terior roll C in the ordinary manner.

apparatus, showing a means for driving the interior roller.

A and B are the standards of the rolls. C is the roll Jfor the external rolling, and Dis the interior roller, provided with the expandinghead E, which, as shown, is located between the body of said roll and the collar or clutch member e, by which said roll is connected with suitable driving mechanism (not shown) when in operative position relative to the cr- T e tube or cylinder F which is being rolled is shown in Figs. 1 to 3 as it appears during the introduction of the interior roller, the position oi' said interior roller being indicated by dotted lines infFig. l. The blank abuts against the stop G, which has an opening G for-,the passage of the expanding-head. When the interior roller D is in rolling position within the blank F' the expanding-head E thereon lies within the opening G and extends into the space betweensaid stop and the standard B. For introducing the interior roller into the blank and withdrawing it when the desired rolling is completed or finished, ahydraulic cylinder H is provided, which produces suiicient pressure to eiect the expansion of the tube or cylinder. The piston or plunger of said hydraulic cylinder is connected to suitable slides L, in one of which is formed a bearing for one end of the roll D.

In the case of thin-walled tubes or cylinders in which the expansion shall be more than the thickness of the walls a suitable yielding resistance is provided. For instance, the holder 'shown in Figs. 4 and 5 may be substituted for the stop Gr. This holder consists of a short cylinder J, having two or more sliding blocks K mounted therein and pressed inwardly by suitable springs 7c. Said blocks are thus adapted to move outwardly radially ofthe cylinder J equally and form a circular support of any desired diameter not exceeding that of the interior of the cylinder by which they are carried. As soon as the expandinghead has arrived near the end of the cylinder which is supported by the aforesaid blocks K it presses the sliding blocks K away from each other, so that the cylinder or tube is supported from the beginning to the end of the IOO expanding operation, notwithstanding the opening between the sliding blocks is large enough for allowing the expanding-head to pass when leaving the blank.

Having now particularly described and ascertained the nature of my said invention and in what manner the saine is to be performed, I declare that what I claim is# s l. In an apparatus for loosening adhering particles from hot tubes or cylinders, the combination of a support having a plurality of Y sliding blocks arranged to bear on and support the blank, an expanding-head and means for moving the expanding-head through the tube or cylinder, so that the latter is stretched in aradial direction, substantially as described and for the purpose set forth.

2. In an apparatus for rolling tubes or cylinders, the combination of two standards, a roll mounted in bearings on said standards and adapted to act on the exterior of a hollow blank, a second roll adapted to act on the interior of the blank, bearings for said interior roll mounted in said standards, an abutment or support for one end of the blank having' an aperture in alinement with the bearings for said interior roll, means for moving' the interior roll longitudinally to and from its bearings in the standards, and an expanding'- head carried by said roll and adapted to eX- tend in to the aperture in said stop or abutment when the interior roll is engaging its bearings in the standards, substantially as and for the purpose described.

3; ln an apparatus for rolling tubes or cylinders, the. combination of a roll adapted to act on the exterior surface of a hollow blank, a second, longitudinally-movable, roll adapted to act on the interior surface of the blank, an abutment or stop for one end of the blank having' an aperture through which the removable roll can pass, a plurality of radially-movable blocks projecting into said aperture in the abutment, springs normally holding' said blocks in their innermost positions, and an expanding-head secured to the longitudinallymovable roll.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANZ HOSENFELDT.

Witnesses:

PETER LIEBER,

WILLIAM EssENwEIN 

